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metag: reuse asm-generic/barrier.h 

On metag dma_rmb, dma_wmb, smp_store_mb, read_barrier_depends,
smp_read_barrier_depends, smp_store_release and smp_load_acquire  match
the asm-generic variants exactly. Drop the local definitions and pull in
asm-generic/barrier.h instead.

This is in preparation to refactoring this code area.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
Michael S. Tsirkin 2015-12-21 09:22:18 +02:00
parent 90ff6a17d0
commit abe114d9f0
1 changed files with 2 additions and 23 deletions
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25
arch/metag/include/asm/barrier.h
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@ -44,9 +44,6 @@ static inline void wr_fence(void)
#define rmb() barrier()
#define wmb() mb()
#define dma_rmb() rmb()
#define dma_wmb() wmb()
#ifndef CONFIG_SMP
#define fence() do { } while (0)
#define smp_mb() barrier()
@ -81,27 +78,9 @@ static inline void fence(void)
#endif
#endif
#define read_barrier_depends() do { } while (0)
#define smp_read_barrier_depends() do { } while (0)
#define smp_store_mb(var, value) do { WRITE_ONCE(var, value); smp_mb(); } while (0)
#define smp_store_release(p, v) \
do { \
compiletime_assert_atomic_type(*p); \
smp_mb(); \
WRITE_ONCE(*p, v); \
} while (0)
#define smp_load_acquire(p) \
({ \
typeof(*p) ___p1 = READ_ONCE(*p); \
compiletime_assert_atomic_type(*p); \
smp_mb(); \
___p1; \
})
#define smp_mb__before_atomic() barrier()
#define smp_mb__after_atomic() barrier()
#include <asm-generic/barrier.h>
#endif /* _ASM_METAG_BARRIER_H */